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Key to Asteraceae, Key from FOV: for editing and augmentation:

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1 Receptacles with paleae or bristles.
..2 Pappus lacking or of scales or awns.
....3 Pappus lacking.
......4 Involucre of dentate or fimbriate phyllaries
......4 Involucre of the pistillate heads a bur with hooked prickles
....3 Pappus present.
........5 Phyllaries dentate or fimbriate
........5 Phyllaries entire
..2 Pappus of bristles.
..........6 Phyllaries fimbriate, dentate, or spiny; leaves often prickly or spiny
..........6 Phyllaries entire, leaves not prickly or spiny.
............ 7 Basal leaves 1-5 mm wide; outer florets pistillate
............ 7 Basal leaves > 5 mm wide (except in Liatris pseudoliatris); florets all perfect.
............ ..8 Phyllaries hooked at tip; heads forming burs at maturity
............ ..8 Phyllaries not hooked at tip; heads not forming burs at maturity.
............ ....9 Heads larger, the involucre 6-15 mm high, with 15-40 phyllaries; leaves with conspicuous (at least at 10× magnification) resin dots
............ ....9 Heads small, the involucre 3.5-6 mm high, with 5-12 phyllaries; leaves without shining punctate glands (except punctate-glandular in Litrisa, of the FL peninsula).
............ ......10 Stem with punctate glands; peduncles punctate-glandular and also hirsutulous; pappus bristles in 2 series; [of FL peninsula]
............ ......10 Stem eglandular, glabrous or spreading-hirsute; peduncles glabrous or stipitate-glandular; pappus bristles in 1 series; [widespread in the Coastal Plain]
1 Receptacles naked.
............ ........11 Pappus lacking or of scales or awns.
............ ..........12 Disk florets blue or purple.
............ ............ 13 Heads few-flowered, aggregated into secondary heads with leafy bracts
............ ............ 13 Heads many-flowered, not aggregated into secondary heads
............ ..........12 Disk florets yellow to yellowish green or reddish to reddish brown.
............ ............ ..14 Cypselas winged and spined; heads sessile in the branch forks
............ ............ ..14 Cypselas not winged and spined; heads not sessile in the branch forks.
............ ............ ....15 Inflorescence elongate, paniculiform, spiciform, or racemiform
............ ............ ....15 Inflorescence a flat-topped corymb, or heads solitary.
............ ............ ......16 Receptacle strongly convex and pointed; plants pineapple-scented
............ ............ ......16 Receptacle flat to convex; plants scented, but not of pineapple
............ ........11 Pappus of barbellate or plumose bristles.
............ ............ ..........18 Perennial; leaves remotely toothed to entire; [of shale barrens]
............ ............ ..........18 Annual; leaves irregularly toothed to pinnatifid; [weed of disturbed soil]
............ ............ ........17 Heads white, whitish, pink, purple, red,
............ ............ ............ ..20 Larger leaves hastate; heads whitish
............ ............ ............ ..20 Leaves not hastate; heads whitish to red or pink to violet or deep purple.
............ ............ ............ ....21 Phyllaries in essentially one series; leaves palmately veined, ovate to reniform
............ ............ ............ ....21 Phyllaries in several series; leaves variously veined, linear to broadly ovate.
............ ............ ............ ......22 Heads white or whitish; [of uplands]
............ ............ ............ ......22 Heads pink to red or violet to deep purple or, rarely, white; [of uplands or wetlands].
............ ............ ............ ........23 Pappus double with inner bristles long and the outer very short
............ ............ ............ 19 Some or all florets pistillate.
............ ............ ............ ............ 25 Phyllaries in essentially one series; fresh plants not strongly scented
............ ............ ............ ............ 25 Phyllaries in several series; fresh plants with a strong, aromatic fragrance
............ ............ ............ ..........24 Leaves white woolly or gray-tomentose, at least beneath (abaxially).
............ ............ ............ ............ ......28 Bristles barbellate to barbellulate; pappi falling
............ ............ ............ ............ ........29 Pappus bristles united at their base, falling as units.
............ ............ ............ ............ ..........30 Blooming Mar-Jul; phyllaries in 3-7 series, sometimes tinged with purple or brown but lacking a conspicuous dark brown spot
............ ............ ............ ............ ..........30 Blooming Jul-Oct; phyllaries in 2-3 series, some or all phyllaries bearing a conspicuous (distal-middle) dark brown spot
............ ............ ............ ............ ........29 Pappus bristles distinct, not united at the base and falling seperately.
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